MCOL-785 Implement DISTRIBUTED JSON functions

The following functions are created:
Create function JSON_VALID and test cases
Create function JSON_DEPTH and test cases
Create function JSON_LENGTH and test cases
Create function JSON_EQUALS and test cases
Create function JSON_NORMALIZE and test cases
Create function JSON_TYPE and test cases
Create function JSON_OBJECT and test cases
Create function JSON_ARRAY and test cases
Create function JSON_KEYS and test cases
Create function JSON_EXISTS and test cases
Create function JSON_QUOTE/JSON_UNQUOTE and test cases
Create function JSON_COMPACT/DETAILED/LOOSE and test cases
Create function JSON_MERGE and test cases
Create function JSON_MERGE_PATCH and test cases
Create function JSON_VALUE and test cases
Create function JSON_QUERY and test cases
Create function JSON_CONTAINS and test cases
Create function JSON_ARRAY_APPEND and test cases
Create function JSON_ARRAY_INSERT and test cases
Create function JSON_INSERT/REPLACE/SET and test cases
Create function JSON_REMOVE and test cases
Create function JSON_CONTAINS_PATH and test cases
Create function JSON_OVERLAPS and test cases
Create function JSON_EXTRACT and test cases
Create function JSON_SEARCH and test cases

Note:
Some functions output differs from MDB because session variables that affects functions output,e.g JSON_QUOTE/JSON_UNQUOTE
This depends on MCOL-5212

utils/funcexp/func_json_exists.cpp

@@ -0,0 +1,51 @@
+#include "functor_json.h"
+#include "functioncolumn.h"
+#include "constantcolumn.h"
+#include "rowgroup.h"
+using namespace execplan;
+using namespace rowgroup;
+
+#include "dataconvert.h"
+
+#include "jsonhelpers.h"
+using namespace funcexp::helpers;
+
+namespace funcexp
+{
+CalpontSystemCatalog::ColType Func_json_exists::operationType(FunctionParm& fp,
+                                                              CalpontSystemCatalog::ColType& resultType)
+{
+  return fp[0]->data()->resultType();
+}
+
+/**
+ * getBoolVal API definition
+ */
+bool Func_json_exists::getBoolVal(Row& row, FunctionParm& fp, bool& isNull,
+                                  CalpontSystemCatalog::ColType& type)
+{
+  const string_view js = fp[0]->data()->getStrVal(row, isNull);
+  if (isNull)
+    return false;
+
+  int jsErr = 0;
+  json_engine_t jsEg;
+  initJSEngine(jsEg, getCharset(fp[0]), js);
+
+  if (!path.parsed && parseJSPath(path, row, fp[1]))
+    goto error;
+
+  if (locateJSPath(jsEg, path, &jsErr))
+  {
+    if (jsErr)
+      goto error;
+    return false;
+  }
+
+  return true;
+
+error:
+  isNull = true;
+  return false;
+}
+}  // namespace funcexp